diff --git a/src/core/bpf_object.cpp b/src/core/bpf_object.cpp
index 9ae949a..1cb5eba 100644
--- a/src/core/bpf_object.cpp
+++ b/src/core/bpf_object.cpp
@@ -4,8 +4,9 @@
 #include "bpf_program.h"
 #include <cerrno>
 
-BpfObject::BpfObject(std::string object_path)
-    : obj_(nullptr), object_path_(std::move(object_path)), loaded_(false) {}
+BpfObject::BpfObject(std::string object_path, py::dict structs)
+    : obj_(nullptr), object_path_(std::move(object_path)), loaded_(false),
+      struct_defs_(structs) {}
 
 BpfObject::~BpfObject() {
   // Clear caches first (order matters!)
diff --git a/src/core/bpf_object.h b/src/core/bpf_object.h
index 49fdb09..a66e73b 100644
--- a/src/core/bpf_object.h
+++ b/src/core/bpf_object.h
@@ -28,12 +28,13 @@ private:
   mutable std::unordered_map<std::string, std::shared_ptr<BpfMap>> maps_cache_;
   mutable std::unordered_map<std::string, std::shared_ptr<BpfProgram>>
       prog_cache_;
+  py::dict struct_defs_;
 
   std::shared_ptr<BpfProgram> _get_or_create_program(struct bpf_program *prog);
   std::shared_ptr<BpfMap> _get_or_create_map(struct bpf_map *map);
 
 public:
-  explicit BpfObject(std::string object_path);
+  explicit BpfObject(std::string object_path, py::dict structs = py::dict());
   ~BpfObject();
 
   // Disable copy, allow move